EP 3837034 A4 20220330 - BIOMASS SELECTION AND CONTROL FOR CONTINUOUS FLOW GRANULAR/FLOCCULENT ACTIVATED SLUDGE PROCESSES
Title (en)
BIOMASS SELECTION AND CONTROL FOR CONTINUOUS FLOW GRANULAR/FLOCCULENT ACTIVATED SLUDGE PROCESSES
Title (de)
BIOMASSEAUSWAHL UND -STEUERUNG FÜR PROZESSE MIT KONTINUIERLICHEM STROM FÜR KÖRNIGEN/FLOCKIGEN AKTIVSCHLAMM
Title (fr)
SÉLECTION ET COMMANDE DE BIOMASSE POUR DES PROCÉDÉS DE BOUES ACTIVÉES GRANULAIRES /FLOCULANTES À ÉCOULEMENT CONTINU
Publication
Application
Priority
- US 201862718313 P 20180813
- US 2019046037 W 20190809
Abstract (en)
[origin: US2020048131A1] A continuous flow granular/flocculent sludge wastewater process selects for granule biomass capable of nitrogen and phosphorus removal and controls granule size and concentration of granular and flocculent sludge for optimal nutrient, organic, and solids removal in a smaller footprint. It includes anaerobic, anoxic, and aerobic process zones, a high soluble biodegradable COD loaded first reactor in anaerobic or anoxic zones, a granular sludge classifier with recycle of underflow granular sludge to the first reactor, a secondary clarifier to settle flocculent sludge and particulates and recycle of flocculent sludge from the secondary clarifier underflow to an aerobic process zone. Wasting of sludge from the two separate recycle lines controls the bioprocess flocculent and granular sludge concentrations and SRTs. Bypass around and recycle flow to the classifier to maintain desired flow under various influent flow conditions aid control of granule size. On/off mixer operation of anaerobic and anoxic reactors may be used.
IPC 8 full level
B01D 21/00 (2006.01); B01D 37/03 (2006.01); B03B 5/48 (2006.01); C02F 1/40 (2006.01); C02F 9/00 (2006.01); C02F 11/02 (2006.01); E03F 5/14 (2006.01)
CPC (source: EP US)
C02F 1/006 (2013.01 - EP); C02F 3/121 (2013.01 - EP); C02F 3/1221 (2013.01 - EP); C02F 3/301 (2013.01 - EP US); C02F 3/302 (2013.01 - EP US); C02F 3/345 (2013.01 - US); C02F 11/004 (2013.01 - US); C02F 11/04 (2013.01 - US); C02F 11/06 (2013.01 - US); C02F 2201/007 (2013.01 - US); C02F 2209/006 (2013.01 - US); C02F 2209/04 (2013.01 - US); C02F 2209/08 (2013.01 - US); C02F 2209/40 (2013.01 - US); C02F 2301/043 (2013.01 - EP); Y02W 10/10 (2015.05 - EP)
Citation (search report)
- [Y] WO 2008141413 A1 20081127 - ZENON TECHNOLOGY PARTNERSHIP [US], et al
- [Y] GB 2396348 A 20040623 - SEV TRENT WATER PURIFICATION L [GB]
- [AP] US 2018230034 A1 20180816 - HORJUS FRANS WIERD [NL]
- [A] US 2014083936 A1 20140327 - MURTHY SUDHIR N [US], et al
- [E] WO 2019195918 A1 20191017 - UNIV MANITOBA [CA]
- [E] US 2020002201 A1 20200102 - STINSON BEVERLEY [US], et al
- [I] NL 2015286 B1 20170228 - HASKONINGDHV NEDERLAND BV [NL]
- See references of WO 2020036832A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
US 10781125 B2 20200922; US 2020048131 A1 20200213; AU 2019321269 A1 20210408; CA 3109511 A1 20200220; DK 3837034 T3 20231211; EP 3837034 A1 20210623; EP 3837034 A4 20220330; EP 3837034 B1 20231004; WO 2020036832 A1 20200220
DOCDB simple family (application)
US 201916537379 A 20190809; AU 2019321269 A 20190809; CA 3109511 A 20190809; DK 19849922 T 20190809; EP 19849922 A 20190809; US 2019046037 W 20190809